code: def test_graph_large_attrs(self):
      plugin = self.load_plugin([_RUN_WITH_GRAPH_WITH_METADATA])
      key = "o---;;-;"
      graph = self._get_graph(
          plugin,
          tag=None,
          is_conceptual=False,
          experiment="eid",
          limit_attr_size=self._MESSAGE_PREFIX_LENGTH_LOWER_BOUND,
          large_attrs_key=key,
      )
      large_attrs = {
          node.name: list(node.attr[key].list.s)
          for node in graph.node
          if key in node.attr
      }
      self.assertEqual({"message_prefix": [b"value"]}, large_attrs)
  
imports: import collections.abc
  import math
  import os.path
  import tensorflow
  from google.protobuf import text_format
  from tensorboard import context
  from tensorboard import errors
  from tensorboard.backend.event_processing import data_provider
  from tensorboard.backend.event_processing import plugin_event_multiplexer
  from tensorboard.compat.proto import config_pb2
  from tensorboard.plugins import base_plugin
  from tensorboard.plugins.graph import graphs_plugin
  from tensorboard.util import test_util
label_desc: Use image node_id 6 for calling the GraphsPluginV1Test obj's underlying member method code with example usage: obj.test_graph_large_attrs() without return types